Improve behavior authoring and typed trace history (untested checkpoint)

harness/TASK_LEDGER.md

@@ -1,5 +1,33 @@
 # Task Ledger — first release
 
+## Current knowledge — 2026-09-10
+
+Given: the renewed objective in `PROJECT_GOAL.md` requires a feature-complete,
+usable OA/SA first release and prioritizes direct behavior/scenario authoring.
+Graphical/source/REST parity, explicit reST semantics, traceability, offline
+guidance, Windows/Linux acceptance and independent review remain required.
+Older scope deferrals must be checked against this request.
+
+Verified: the checkout began clean at `1797516`; Gitea contains one active
+continuation issue and no open PR. Current code includes direct behavior editors,
+so old blanket descriptions of static diagrams need workflow-level reassessment.
+The machine began without the ignored historical toolchain/cache/distributions.
+Local Rust/Cargo 1.98.1 and verified LLVM-MinGW are now installed; dependency
+fetch is pending and no current binary has been built. Native Computer Use is
+available. Isolated Capella activity/lifeline/LOOP creation was saved and checked;
+no Arcadia window is running. Candidate B1/B2/B3 and F1 edits are source-complete,
+formatted and whitespace-clean, but have no fresh compile/test/runtime pass.
+
+Assumption: the selected compact architecture palette remains a promising design,
+pending real authoring evidence. Decision: repair and evaluate it before further
+redesign. Parallel independent audits identify current behavior and semantic gaps
+instead of reimplementing integrated work.
+
+Open questions: which remaining menu-only behavior operations prevent a coherent
+direct workflow; which first-release semantic/parity gaps remain; and how to
+complete current Linux runtime acceptance. Root owns integration and native
+control; worker ownership is disjoint. See `STATE.md` and Gitea #1.
+
 **Superseding user direction:** large horizontal creation buttons were rejected as intrusive and unprofessional. The user explicitly authorized consulting the installed Capella; that consultation has resumed and established actual compact palette, inline rename and explicit activity-allocation behavior. See [Capella 7.1 evidence and selected redesign](release-capella-basic-editing-20260907.md). The current candidate replaces creation/connection rows with one compact expandable palette and an in-place name editor. Native acceptance of the redesigned executable is pending; compactness is not assumed to prove usability. The earlier Escape hold and proposed toolbar-only correction below are superseded.
 
 **Latest evidence:** basic editing full desktop584/584, bins, formatting and strictClippy passed. Native named Entity creation works at100%, but changing pending-toolbar height moves the screen placement22px. User Escape stopped the attempted Undo; native checks are paused again. Code-only toolbar correction proceeds. [Current findings](release-basic-editing-reset-20260907.md). The previous goal turn made concrete progress through implementation, integration gates and a native-discovered defect; this is not a no-progress blocker turn.